Seborrheic keratosis is a common skin growth. They are not contagious. Most often seborrheic keratoses start as small, rough bumps. Then slowly they thicken and get a warty surfaceIt may look worrisome, but it is benign not cancer. These growths often appear in middle-aged and older adults. Some people get just one. It is, however, more common to have many. They range in color from white to black. Most are tan or brown.
The approximate rate is highest with a prevalence of around 50% and the rate is estimated to be between 21% and 46% Seborrheic keratoseson exposed areas were more often flat and more than 3 mm in diameter than those on the non-exposed areas.
Seborrheic keratoses are noncancerous benign skin growths that some people develop as they age. They often appear on the back or chest, but can occur on any part of the body. Seborrheic keratoses grow slowly, in groups or singly. Most people will develop at least one seborrheic keratosis during their lifetime.